Which instrument is used to measure wind direction?

• A. Anemometer
• B. Hygrometer
• C. Wind Rose
• D. Barometer

Answer: (C)

Understanding wind direction information comes from collecting data on where the wind is coming from over time and then presenting it in a way that clearly shows patterns. A wind rose does just that: it is a circular diagram that groups wind directions into sectors and shows how often the wind comes from each direction, often with layers for different wind speeds. This makes it the best tool for visualizing where the wind typically comes from at a location, which is exactly what measuring wind direction aims to reveal.

Anemometers measure how fast the wind is blowing, not where it’s coming from. Hygrometers measure humidity, and barometers measure air pressure. A wind vane does indicate direction, but the given option most directly communicates the directional pattern data over time is the wind rose.